@article {4592, title = {Hybrid and Asymmetric Supercapacitors: Achieving Balanced Stored Charge across Electrode Materials}, journal = {Small}, volume = {n/a}, year = {2024}, note = {

n/a

}, month = {2024}, pages = {2400558}, publisher = {John Wiley \& Sons, Ltd}, abstract = {

Abstract An electrochemical capacitor configuration extends its operational potential window by leveraging diverse charge storage mechanisms on the positive and negative electrodes. Beyond harnessing capacitive, pseudocapacitive, or Faradaic energy storage mechanisms and enhancing electrochemical performance at high rates, achieving a balance of stored charge across electrodes poses a significant challenge over a wide range of charge?discharge currents or sweep rates. Consequently, fabricating hybrid and asymmetric supercapacitors demands precise electrochemical evaluations of electrode materials and the development of a reliable methodology. This work provides an overview of fundamental aspects related to charge-storage mechanisms and electrochemical methods, aiming to discern the contribution of each process. Subsequently, the electrochemical properties, including the working potential windows, rate capability profiles, and stabilities, of various families of electrode materials are explored. It is then demonstrated, how charge balancing between electrodes falters across a broad range of charge?discharge currents or sweep rates. Finally, a methodology for achieving charge balance in hybrid and asymmetric supercapacitors is proposed, outlining multiple conditions dependent on loaded mass and charge?discharge current. Two step-by-step tutorials and model examples for applying this methodology are also provided. The proposed methodology is anticipated to stimulate continued dialogue among researchers, fostering advancements in achieving stable and high-performance supercapacitor devices.

}, keywords = {charge balancing, charge{\textendash}discharge current density, electrochemical capacitor, hybrid and asymmetric device, rate capability, SUPERCAPACITOR, sweep rate}, isbn = {1613-6810}, url = {https://doi.org/10.1002/smll.202400558}, author = {Mohammad Qorbani and Kuei-Hsien Chen and Li-Chyong Chen} } @article {4389, title = {High-efficient photocatalytic degradation of commercial drugs for pharmaceutical wastewater treatment prospects: A case study of Ag/g-C3N4/ZnO nanocomposite materials}, journal = {Chemosphere}, volume = {282}, year = {2021}, note = {

n/a

}, month = {2021}, pages = {130971}, abstract = {

Pharmaceutical drugs{\textquoteright} removal from wastewater by photocatalytic oxidation process is considered as an attractive approach and environmentally friendly solution. This report aims to appraise the practical application potential of Ag/g-C3N4/ZnO nanorods toward the wastewater treatment of the pharmaceutical industry. The catalysts are synthesized by straightforward and environmentally-friendly strategies. Specifically, g-C3N4/ZnO nanorods heterostructure is constructed by a simple self-assembly method, and then Ag nanoparticles are decorated on g-C3N4/ZnO nanorods by a photoreduction route. The results show that three commercial drugs (paracetamol, amoxicillin, and cefalexin) with high concentration (40~mg~L-1) are significantly degraded in the existence of a small dosage of Ag/g-C3N4/ZnO nanorods (0.08~g~L-1). The Ag/g-C3N4/ZnO nanorods photocatalyst exhibits degradation performance of paracetamol higher 3.8, 1.8, 1.3 times than pristine g-C3N4, ZnO nanorods, and g-C3N4/ZnO nanorods. Furthermore, Ag/g-C3N4/ZnO nanorods have an excellent reusability and a chemical stability that achieved paracetamol degradation efficiency of 78\% and remained chemical structure of the photocatalyst after five cycles. In addition, the photocatalytic mechanism explanation and comparison of photocatalytic drugs{\textquoteright} degradation ability have also been discussed in this study.

}, keywords = {Ag/g-CN/ZnO nanorods, Catalyst dose, Commercial pharmaceuticals, Photocatalytic degradation, Visible light}, isbn = {0045-6535}, url = {https://www.sciencedirect.com/science/article/pii/S0045653521014430}, author = {Thang, Nguyen Quoc and Sabbah, Amr and Li-Chyong Chen and Kuei-Hsien Chen and Thi, Cao Minh and Viet, Pham Van} } @article {4357, title = {Highly improved thermoelectric performance of BiCuTeO achieved by decreasing the oxygen content}, volume = {15}, year = {2020}, note = {n/a}, month = {2020}, pages = {100248}, abstract = {

BiCuTeO is a promising thermoelectric material owing to its intrinsically low thermal conductivity and high carrier concentration. This study investigated the influence of stoichiometric oxygen deficiencies on the thermoelectric performance of BiCuTeO. Bulk BiCuTeO1-x (0.16 >= x) samples were prepared by a conventional solid state reaction and pelleted by hot pressing. Synchrotron X-ray diffraction, electron probe X-ray microanalysis, scanning electron microscopy, and transmission electron microscopy characterized the samples. A maximum value of 1.06 was achieved for the dimensionless figure of merit ZT at 673~K for BiCuTeO0.88, which is approximately 49\% better than the current maximal ZT value for BiCuTeO. The power factor was noticeably improved owing to increases in the electrical conductivity and Seebeck coefficient. Moreover, the optimal oxygen deficiency could introduce nanoparticles, resulting in reduced thermal conductivity. The findings will be important for the future development of metal oxide thermoelectric materials for use in practical thermoelectric devices.

}, keywords = {Electrical conductivity, Figure of merit, Hot pressing, Secondary phases, thermal conductivity}, isbn = {2542-5293}, url = {https://www.sciencedirect.com/science/article/pii/S2542529320300729}, author = {H.-C. Chang and Chen, T.-H. and R. Sankar and Y-J Yang and L.-C. Chen and K.-H. Chen} } @article {3848, title = {Highly efficient nitrogen and carbon coordinated N{\textendash}Co{\textendash}C electrocatalysts on reduced graphene oxide derived from vitamin-B12 for the hydrogen evolution reaction}, journal = {Journal of Materials Chemistry A}, volume = {7}, year = {2019}, note = {n/a}, month = {2019}, pages = {7179 - 7185}, publisher = {The Royal Society of Chemistry}, abstract = {

Exploring electrocatalysts composed of earth-abundant elements for a highly efficient hydrogen evolution reaction (HER) is scientifically and technologically important for electrocatalytic water splitting. In this work, we report HER properties of acid treated pyrolyzed vitamin B12 supported on reduced graphene oxide (B12/G800A) that shows an extraordinarily enhanced catalytic activity with low overpotential (115 mV vs. RHE at 10 mA cm-2), which is better than that of most traditional nonprecious metal catalysts in acidic media. Stability tests through long-term potential cycles and at a constant current density confirm the exceptional durability of the catalyst. Notably, the B12/G800A catalyst exhibits extremely high turnover frequencies per cobalt site in acid, for example, 0.85 and 11.46 s-1 at overpotentials of 100 and 200 mV, respectively, which are higher than those reported for other scalable non-precious metal HER catalysts. Moreover, it has been conjectured that the covalency of Co{\textendash}C and Co{\textendash}N bonds affects HER activities by comparing the extended X-ray absorption fine structure (EXAFS) spectra of the B12/G800A. High-temperature treatment can modify the Co-corrin structure of B12 to form Co{\textendash}C bonds along with Co{\textendash}N, which broadens the band of cobalt, essentially lowering the d-band center from its Fermi level. The lower d-band center leads to a moderate hydrogen binding energy, which is favorable for hydrogen adsorption and desorption.

}, isbn = {2050-7488}, url = {http://dx.doi.org/10.1039/C8TA10935D}, author = {Sabhapathy, Palani and Liao, Chen-Cheng and Wei-Fu Chen and Tsu-chin Chou and Indrajit Shown and Sabbah, Amr and Yan-Gu Lin and Jyh-Fu Lee and Tsai, Ming-Kang and Kuei-Hsien Chen and Li-Chyong Chen} } @article {2859, title = {High-κ Samarium-Based Metal{\textendash}Organic Framework for Gate Dielectric Applications}, journal = {ACS Appl. Mater. Interfaces}, volume = {9}, year = {2017}, pages = {21872{\textendash}21878}, author = {Abhishek Pathak and Guan Ru Chiou and Narsinga Rao Gade and Muhammad Usman and Shruti Mendiratta and Tzuoo-Tsair Luo and Tien Wen Tseng and Jenq-Wei Chen and Fu-Rong Chen and Kuei-Hsien Chen and Li-Chyong Chen and Kuang-Lieh Lu} } @article {2854, title = {Hybrid bimetallic-N4 electrocatalyst derived from a pyrolyzed ferrocene{\textendash}Co-corrole complex for oxygen reduction reaction}, journal = {Journal of Materials Chemistry A}, volume = {5}, year = {2017}, pages = {9279-9286}, attachments = {https://labs.iams.sinica.edu.tw/project/sites/default/files/chenkh/files/satya.pdf}, author = {Satyanarayana Samireddi and Indrajit Shown and Tzu-Hsien Shen and Hsin-Chih Huang and Ken-Tsung Wong and Li-Chyong Chen and Kuei-Hsien Chen} } @article {2557, title = {Hierarchically porous Ca-containing MnO2 nanorod bundles with superior photoelectrochemical activity}, journal = {ChemCatChem }, volume = {6}, year = {2014}, pages = { 1684}, author = {Y.G. Lin and Y. C. Chen and J.T. Miller and L. C. Chen and K. H. Chen and Y.K. Hsu} } @article {2548, title = {A high performance polybenzimidazole-CNT hybrid electrode for high-temperature proton exchange membrane fuel cells}, journal = {J. of Mater. Chem. }, volume = {2}, year = {2014}, pages = {7015-7019 }, author = {H. Y. Du and C. H. Wang and C.S. Yang and H. C. Hsu and S.T. Chang and H. C. Huang and S.W. Lai and J.C. Chen and T. Leon Yu and L. C. Chen and K. H. Chen} } @article {1756, title = {High K nanophase zinc oxide on biomimetic silicon nanotip array as super-capacitors}, journal = {Nano Letters}, volume = {13}, year = {2013}, pages = {1422-1428}, author = {H.C. Han and C.W. Chong and S.B. Wang and D. Heh and C.A. Tseng and Y.F. Huang and S. Chattopadhyay and K. H. Chen and C.F. Lin and J.H. Lee and L. C. Chen} } @article {209, title = {High-cell-voltage supercapacitor of carbon nanotube/carbon cloth operating in neutral aqueous solution}, journal = {Journal of Materials Chemistry}, volume = {22}, year = {2012}, pages = {3383-3387}, author = {Yu-Kuei Hsu and Ying-Chu Chen and Yan-Gu Lin and Li-Chyong Chen and Kuei-Hsien Chen} } @article {1733, title = {Highly proton-selective biopolymer layer-coated ion-exchange membrane for direct methanol fuel cells}, journal = {ChemSusChem.}, volume = {5}, year = {2012}, pages = {392-395 }, author = {S. K. Nataraj and C. H. Wang and H. C. Huang and H. Y. Du and S. F. Wang and Y. C. Chen and L. C. Chen and K. H. Chen} } @article {1701, title = {High performance of catalysts supported by directly grown PTFE-free micro-porous CNT layer in a proton exchange membrane fuel cell}, journal = {J. Mater. Chem.}, volume = {21}, year = {2011}, pages = {2512-2516}, author = {H. Y. Du and C. H. Wang and H. C. Hsu and S.T. Chang and S.C. Yen and L. C. Chen and B. Viswanathan and K.H. Chen*} } @article {1710, title = {Highly flexible supercapacitors with manganese oxide nanosheet/carbon cloth electrode}, journal = {Electrochem. Acta}, volume = {56}, year = {2011}, pages = {7124-7130}, author = {Y. C. Chen and Y.K. Hsu and Y.G. Lin and Y.K. Lin and Y.Y. Horng and L. C. Chen and K. H. Chen} } @article {1675, title = {Heteroepitaxy of m-plane (1010) InN on (100)-LiAlO2 substrates and its strong anisotropic optical behaviors}, journal = {,J. Appl. Phys.}, volume = {107}, year = {2010}, pages = {073502}, author = {C. L. Hsiao and J. T. Chen and H. C. Hsu and Y.C. Liao and P.H. Tseng and Y. T. Chen and Z.C. Feng and L.W. Tu and M. C. Chou and L. C. Chen and K. H. Chen} } @article {1668, title = {High-gain photoconductivity in semiconducting InN nanowires}, journal = {Appl. Phys. Lett.}, volume = {95}, year = {2009}, pages = {162112}, author = {R. S. Chen and T. H. Yang and H.Y. Chen and L.C. Chen* and K.H. Chen* and Y.J. Yang and C.H. Su and C.R. Lin} } @article {1638, title = {High photocurrent gain in SnO2 nanowires}, journal = {Appl. Phys. Lett.}, volume = {93}, year = {2008}, pages = {112115}, author = {Lin, C. H. and R. S. Chen and T. T. Chen and H.Y. Chen and Y. F. Chen* and K. H. Chen and L. C. Chen} } @article {1632, title = {High-phase-purity zinc-blende InN on r-plane sapphire substrate with controlled nitridation pretreatment}, journal = {Appl. Phys. Lett.}, volume = {92}, year = {2008}, pages = {111914}, author = {C. L. Hsiao and T. W. Liu and C. T. Wu and H. C. Hsu and L.C. Chen* and W.Y. Hsiao and C.C. Yang and A. G{\"a}llstr{\"o}m and P. Holtz and G. M. Hsu and K.H. Chen*} } @article {1644, title = {Hot Photoluminescence in Gamma In2Se3 Nanorods}, journal = {Nanoscale Res. Lett.}, volume = {3}, year = {2008}, pages = {427}, author = {M. D. Yang and C. H. Hu and J. L. Shen* and S. M. Lan and P.J. Huang and G. C. Chi and K. H. Chen and L. C. Chen and Y. T. Lin} } @article {1611, title = {High performance of low electrocatalysts loading on CNT directly grown on carbon for DMFC}, journal = {J. Power Sources}, volume = {171}, year = {2007}, pages = {55-62}, author = {C. H. Wang and H.-Y. Du and Y. T. Tsai and C.P. Chen and C.J. Huang and L. C. Chen and K.H. Chen* and H. C. Shih} } @article {1600, title = {High methanol oxidation activity of electrocatalysts supported by directly grown nitrogen containing carbon nanotubes on carbon cloth}, journal = {Electrochimica Acta}, volume = {52}, year = {2006}, pages = {1612-1617}, author = {C. H. Wang and H. C. Shih and Y. T. Tsai and H. Y. Du and L. C. Chen and K.H. Chen*} } @article {1548, title = {Hexagonal-to-cubic phase transformation in GaN nanowires by Ga+ implantation}, journal = {Appl. Phys. Lett.}, volume = {84}, year = {2004}, pages = {5473-5475}, author = {S. Dhara and A. Datta and C. T. Wu and Lan, Z. H. and K.H. Chen* and Wang, Y. L. and C. W. Hsu and C. H. Shen and L. C. Chen and Chen, C. C.} } @article {1521, title = {Heterostructures of ZnO-Zn coaxial nanocables and ZnO nanotubes}, journal = {Appl. Phys. Lett.}, volume = {81}, year = {2002}, pages = {1312-1314}, author = {J.J. Wu and S. C. Liu and C. T. Wu and K.H. Chen* and L. C. Chen} } @article {1518, title = {High growth rate deposition of oriented InN films}, journal = {Thin Solid Films}, volume = {405}, year = {2002}, pages = {194-197}, author = {F.H. Yang and Y.J. Yang* and J.H. Hwang and K. H. Chen and T.H. Li and L.G. Hwa and L. C. Chen} } @article {1485, title = {High current density field emission from arrays of carbon nanotubes and diamond-clad Si tips}, journal = {J. Vac. Sci. Tech}, volume = {B 18}, year = {2000}, pages = {1207-1211}, author = {F. G. Tarntair and L. C. Chen and S.L. Wei and W.K. Hong and K. H. Chen and H. C. Cheng} } @article {1464, title = {High purity nano-crystalline carbon nitride films prepared at ambient temperature by ion beam sputtering}, journal = {Surface and Coatings Technology }, volume = {115}, year = {1999}, pages = {116-122}, author = {T.R. Lu, , , , , and C.T. Kuo* and J.R. Yang and L. C. Chen and K. H. Chen and T.M. Chen} } @article {1221, title = {Highly transparent nano-crystalline diamond films grown by microwave CVD}, journal = {Solid State Comm.}, volume = {107}, year = {1998}, pages = {301-305}, author = {D. M. Bhusari and K. H. Chen and T.R. Yang and S.T. Lin and T.Y. Wang and L. C. Chen} } @article {1219, title = {Highly transparent nano-crystalline diamond films via substrate pretreatment and methane fraction optimization}, journal = {Thin Solid Films}, volume = {332}, year = {1998}, pages = {34-39}, author = {K.H. Chen* and D. M. Bhusari and J.R. Yang and S.T. Lin and T.Y. Wang and L. C. Chen} } @article {1206, title = {High-temperature Raman Study in CVD Diamond}, journal = {Thin Solid Films}, volume = {270}, year = {1995}, pages = {143}, author = {K. H. Chen and Y.L. Lai and L. C. Chen and J.Y. Wu and Kao, F. J.} }